|Location||Porstmouth, Rhode Island|
|Episode(s)||13.17 The Thing|
Marco Avila is the great-grandson of Diego Avila of Rhode Island and the sister of Ophelia Avila. He is a Men of Letters legacy and his family and the townspeople have been guarding Yokoth for the past hundred years. He is also the cook at "Krispy's Diner" which is located a few miles away from Capitulum 7. His arm has a tattoo of a variant of the Aquarian Star with the eye of Providence at its center.
When Sam and Dean unwittingly release Yokoth who is possessing Sandy Porter, Marco, his sister Ophelia, and other local legacies try to capture her. Marco drugs Sam, Dean, and Sandy's food, although only Sam eats his. In his drugged state, Marco and Ophelia are able to capture him. Ophelia explains the situation, that she and the other legacies have been guarding and starving Yokoth for the last 100 years. Ophelia, Sam, and Marco then find the other legacies dead and Dean gone.
Sam, Ophelia, and Marco go the chapterhouse and find Yokoth doing the ritual to open the portal, and Dean restrained on the altar. They manage to get the Seal of Solomon from her. Ophelia uses it to close the portal. Just before it closes, Glythur grabs Yokoth, returning her to her own universe.